Not much known about ERKO Fotowerk Radewensky & Koszuszek. It was established in 1920s(?), in Freital (Mozartstraße 6), Germany, by two
entrepreneurs - Messrs. Radewensky and Koszuszek. In March 1924 the company went bankrupt, and the premises were reused by the ERKOS company,
owned solely by Arno Koszuszek.
Interestingly, around the same time, in 1914, Walter Waurich, Waldemar Radewensky and Theodor Weber founded another Freital company -
Weeka-Kamera-Werk (later Welta). Considering the Radewensky is not a very common last
name, it could have been the same person.